FDA approves Moderna’s mRNA flu vaccine, the first to use the technology

In a move that seemed out of reach just six months ago, the Food and Drug Administration approved Moderna’s influenza vaccine for older adults on Wednesday, the first licensed flu shot made using messenger RNA technology. In February, Vinay Prasad, the FDA’s head of biologics at the time, overturned the recommendation of career staff and issued a rare “refusal-to-file” notice to the company, saying the agency wouldn’t review the vaccine based on the available data package. Two weeks later — afte...